immobilizer error

hello guys .. recently I wrote immobilizer malfunction on the screen without starting the car and the car did not work .. after waiting for a while did not write and worked .. has not been error for a few days but i am traveling with 2 keys from fear is it a situation related to this key? or is it relevant to the vehicle? Would you be happy if anyone who has experience is sharing a possible situation ..

The key was no water or water exposure, oxidation etc. in the internal circuits. it may be starting to happen. I recommend that you clean the electronic circuit inside the switch with a product such as oil-free contact spray.